Watch grain getting into storage. If you filled storage to a roof, sell or eat so much grain that you could get freely on a grain surface. You look for small changes which are indicators of future problems. Check a surface for signs of emergence of a crust - the damp, sticky or frozen together grain. Watch a roof – behind existence of the real or last condensation. Push a hand in grain and check, whether you can find any heating. Gather a grain handful at a depth of a hand and from a surface, and check for mold smells. Include a winnower to smell the air leaving it.
If additional ventilation is necessary for cooling of small hot sites, include a winnower if only air is outside no more than 10 degrees warmer than grain. If it is necessary, include a winnower during warm part of day. If there is a serious heating, use a winnower day and night, despite weather and temperature until heating does not stop.
Though movement of moisture can happen at any time when temperature differs in different parts of storage, the most critical time arises when warm grain is stored at a cold winter temperature. Grain is usually put on storage, when its temperature of 50-80 degrees Fahrenheit, and sometimes above.
When grain was cooled, include a winnower to smell the air leaving it on existence of the bad smells proceeding from grain which can start spoiling. When you include a winnower, choose clear day, when air and grain about one temperature. But such day can not always drop out for the regular day of check chosen by you, and it can be not always possible to include a winnower when you check a condition of grain.
In the past operators of elevators shifted grain from one storage in another to counterbalance temperatures, to cool grain and to mix the mass of grain. And though grain movement effectively interferes with movement of moisture and destroys hot congestions, the empty storage, time and work are necessary for it. Besides because of it a large amount of grain is damaged.
It is better to close something a winnower when you do not ventilate to prevent the air movement which is caused by natural effect of draft in high storages. Also this covering prevents access of pets and rodents.
It is necessary to carry out an inspection of inside of a roof in cold mornings on availability of the condensed moisture or ice before the sun heats a roof. Such condensation of moisture is almost always a sign of movement of moisture and often reflects a bad condition of grain. Without regard to a grain storage time, the main rule is maintenance of temperature of grain at the level of 15-20 degrees Fahrenheit on average.
Ventilate to cool grain to 35-40 degrees Fahrenheit for winter storage on the Midwest in its northern parts (South Dakota, Northern Dakota, Minnesota, Wisconsin) grain has to be cooled to 30-35 degrees as average winter temperatures are lower. Begin a ventilating cycle when average temperature is 10-15 degrees lower than temperature of grain. As grain from the high-temperature dryer is usually 10 degrees warmer than air, grain needs to be put in storage and to begin ventilation immediately.
Grain freezing reduces damage potential a little, but it is not necessary for well dried up, ventilated grain. Because of possible problems, freezing of grain is not welcomed. Condensation during ventilation can be a problem in the cooled grain. Can be difficult to warm grain in the spring without condensation freezing. The frozen together pieces of grain block the heating cycles. Use at the frozen winnower grain only with rather dry air, which same or colder than grain in the winter.